Account settled but no paid up letter issued by Vericred

I received a settlement offer to settle my RCS account (Ref ********** ********** ) by 30 March 2018 from Vericred which was R19589.00. I was given a Pay@ Reference number to make the payment. On the 26 March 2018 I went to make payment at a Pay@ paypoint at Checkers and I was advised that the maximum transaction amount is R15000 so I have to split the settlement amount and I then paid R15000 and R4589 respectively. Vericred subsequently said they cant issue a paid up letter immediately because I was only supposed to make 1 payment despite receiving the full amount before the 30th March through a payment method I got from them.

4 weeks later Vericred has still not sent me a paid up letter as promised up to this point and my credit report has not been updated with the payment that was made. After more than 10 telephone calls in the last 3 weeks I have been promised and told that the letter will be issued as soon as it is received from Head office but nothing has come through and I need it ASAP.